Fujitsu ETERNUS AF250 Design Manual page 58

1. Function
Optimization of Volume Configurations
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Migration among RAID Groups
RAID Migration
•
The performance of the current RAID groups may not be satisfactory due to conflicting volumes after perform-
ance requirements have been changed. Use RAID Migration to improve the performance by redistributing the
volumes amongst multiple RAID groups.
●
Changing the RAID Level
RAID Migration (to a RAID group with a different RAID level)
•
Migrating to a RAID group with a different RAID level changes the RAID level of volumes. This is used to con-
vert a given volume to a different RAID level.
Logical Device Expansion (and changing RAID levels when adding the new drives)
•
The RAID level for RAID groups can be changed. Adding drives while changing is also available. This is used to
convert the RAID level of all the volumes belonging to a given RAID group.
●
Striping for Multiple RAID Groups
Wide Striping
•
Distributing a single volume to multiple RAID groups makes I/O access from the server more efficient and im-
proves the performance.
FUJITSU Storage ETERNUS AF250 S2, ETERNUS AF250 All-Flash Arrays Design Guide (Basic)
Copyright 2019 FUJITSU LIMITED
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